The spider genus Selenops Latreille occurs in both the Old World and New World tropics and subtropics and contains nearly half of the species in the family Selenopidae Simon. In this paper I revise the members of this genus found in North America, Central America, and on islands of the Caribbean, excluding Cuban endemics. Despite recent work in these regions, there is still a great deal of new diversity in the form of undescribed species. In the United States species, there is a great deal of variation among species, and there appears to be overlap of up to three species in a particular locality. Additionally, males and females were described from different localities, adding to the uncertainty surrounding species placement. No taxonomic changes are currently made to the species from the southwestern United States. In total, 21 new species are described including S. arikok sp. n., S. chamela sp. n., S. amona sp. n., S. baweka sp. n., S. bocacanadensis sp. n., S. enriquillo sp. n, S. ixchel sp. n., S. huetocatl sp. n., S. kalinago sp. n., S. oviedo sp. n., S. morro sp. n., S. denia sp. n., S. duan sp. n., S. malinalxochitl sp. n., S. oricuajo sp. n., S. petenajtoy sp. n., S. guerrero sp. n., S. makimaki sp. n., S. souliga sp. n., S. wilmotorum sp. n., and S. wilsoni sp. n. Selenops lunatus Muma is recognized as a junior synonym of S. candidus Muma, S. tehuacanus Muma, S. galapagoensis Banks and S. vagabundus Kraus are recognized as junior synonyms of S. mexicanus Keyserling, S. santibanezi Valdez-Mondragon is recognized as a junior synonym of S. nigromaculatus Keyserling, and S. salvadoranus Chamberlin is recognized as a junior synonym of S. bifurcatus Banks. The males of S. bani Alayon-Garcia and S. marcanoi Alayon-Garcia are described for the first time, and the females of S. phaselus Muma and S. geraldinae Corronca are described for the first time. Almost all species are redescribed, barring Cuban endemics and a few species only recently described, and new illustrations are provided, including those of the internal female genitalia, many of which are illustrated for the first time. A key to species is also provided as are all new distributional records.
